Company lists · Data refreshed September 2026
Top 25 IT security consulting firms based in Seattle, United States
RevenueBase identified 64 IT security consulting firms headquartered in Seattle, United States as of September 2026 and tracks 348 professional contacts across them, including 127 with verified work emails. New York is the largest hub.
This list covers IT security consulting firms headquartered in Seattle, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest IT security consulting firms based in Seattle, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 38 | ||||
“Anvil is an information security consulting firm focused on top tier consulting.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 2 | Kalles GroupPartial evidence | 35 | |||
“Kalles Group partners with CIOs, CISOs, and security leaders to strengthen security programs, reduce operational risk, and build resilience during periods of change.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 3 | 32 | ||||
“Advantage Partners is a security & compliance organization dedicated to helping emerging technology companies navigate the complexities of security and compliance.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 4 | 22 | ||||
“DSE is a boutique security firm with a focus on Active Directory.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 5 | 21 | ||||
“Copperhead Consulting is a team of highly capable Agents, Investigators, Special Operations Veterans and technical professionals.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 6 | 20 | ||||
“SWAT Systems is now Convergence Networks!” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 7 | Rhino Security Labs, INCPartial evidence | 20 | |||
“Rhino Security Labs is a top penetration testing and security assessment firm with a focus on cloud pentesting (AWS, GCP, Azure), network pentesting, web application pentesting…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 8 | 15 | ||||
“Interplay IT is a trusted, Seattle-based IT partner specializing in Architecture, Engineering, Construction, and Mission-Driven Nonprofits.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 9 | Markgraf ConsultingStrong evidence | 12 | |||
“Markgraf Consulting is a premier technology consulting firm specializing in SAP security, cloud solutions, and system architecture.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 10 | 7 | ||||
“Forge Technology Advisors provides a customized suite of IT and Telecommunications consulting services-including Cybersecurity, SASE, UCaaS, CCaaS, and Networking-tailored to meet…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 11 | 5 | ||||
“Intelligent Technical Solutions is your trusted business partner for all your Cybersecurity, Managed and Co-managed IT support, Risk & Compliance, Data Analytics, and Consulting…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 12 | Security Research GroupPartial evidence | 4 | |||
“Security Research Group provides military-grade cybersecurity solutions, specializing in threat detection, compliance, incident response, and custom cyber strategies to protect…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 13 | 4 | ||||
“Enetics Networks was founded in 1998 to provide smart, cost-effective technology solutions for businesses throughout Washington state.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 14 | VertiancePartial evidence | 4 | |||
“Trusted IT support, strategy, and cybersecurity for small businesses.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 15 | 3 | ||||
“We are an IT consulting team that partners with clients to elevate their IT security skills and knowledge in crafting, deploying, and supporting intelligent and leading-edge IP…” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 16 | 3 | ||||
“A small, surgical team of security specialists with deep expertise in embedded systems, IoT, and connected hardware.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 17 | Positroniq, LLCPartial evidence | 3 | |||
“At Positroniq, we help to protect organizations through assessment and advisory services designed to improve security, risk, and compliance programs and processes.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 18 | Vcto SecureIndirect evidence | 3 | |||
“VCTO Secure empowers clients by Making I.T.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 19 | ZOVEPartial evidence | 2 | |||
“Zove Security secures the products and platforms that power innovation and underpin all our digital lives.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 20 | Section9labsIndirect evidence | 2 | |||
“Section9Labs is a startup based in Seattle, WA.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 | ||||
“Culper Partners offers strategic business consulting at the intersection of technology, national security, law enforcement, public policy and regulation.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 22 | Seattlepro EnterprisesIndirect evidence | 1 | |||
“SeattlePro Enterprises is a close-knit team of creative visionaries offering companies the guidance and education professionals need to stay competitive in today's market.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 23 | Stepfar Technology GroupIndirect evidence | 1 | |||
“At Stepfar Technology Group, we are dedicated to empowering businesses with cutting-edge technology solutions.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 | ||||
“At Aorca, we deliver reliable, secure, and strategic IT services designed to help businesses thrive in an increasingly digital world.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 | ||||
“Fretwork Security Advisors is a consultancy dedicated to delivering multi-disciplinary advisory services to clients in the executive suite.” Source: company website · checked Sep 4, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 64 IT security consulting firms based in Seattle, United States
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IT security consulting firms based in Seattle, United States at a glance
As of Sep 4, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 64 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among IT security consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Seattle, United States whose own description of what they do matches “IT security consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among IT security consulting firms, and records with no verified work email. Companies headquartered outside Seattle are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 127 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 4, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
IT security consulting firms by metro in the United States
- IT security consulting firms in New York239
- IT security consulting firms in Houston148
- IT security consulting firms in Atlanta139
- IT security consulting firms in Washington138
- IT security consulting firms in Dallas119
- IT security consulting firms in Austin117
- IT security consulting firms in Miami114
- IT security consulting firms in Chicago113
- IT security consulting firms in Tampa95
- IT security consulting firms in San Francisco93
- IT security consulting firms in Los Angeles84
- IT security consulting firms in San Diego77
- IT security consulting firms in Boston69
- IT security consulting firms in Charlotte69
- IT security consulting firms in Denver68
- IT security consulting firms in Arlington64
- IT security consulting firms in Seattle64
- IT security consulting firms in San Antonio59
- IT security consulting firms in Phoenix57
- IT security consulting firms in Orlando54
- IT security consulting firms in Reston51
- IT security consulting firms in Alexandria50
- IT security consulting firms in Columbia47
- IT security consulting firms in Las Vegas45
- IT security consulting firms in Raleigh45
- IT security consulting firms in Ashburn42
- IT security consulting firms in Columbus38
- IT security consulting firms in Fairfax37
- IT security consulting firms in Mclean37
- IT security consulting firms in Portland37
- IT security consulting firms in Scottsdale37
- IT security consulting firms in Baltimore35
- IT security consulting firms in Nashville35
- IT security consulting firms in Richmond35
- IT security consulting firms in Huntsville34
- IT security consulting firms in Minneapolis34
- IT security consulting firms in San Jose34
- IT security consulting firms in Plano32
- IT security consulting firms in Pittsburgh31
- IT security consulting firms in Herndon30
- IT security consulting firms in Sheridan30
- IT security consulting firms in Philadelphia29
- IT security consulting firms in Wilmington28
- IT security consulting firms in Frisco26
- IT security consulting firms in Indianapolis26
- IT security consulting firms in Sacramento26
Frequently asked
How many IT security consulting firms are there based in Seattle, United States?
RevenueBase identified 64 IT security consulting firms headquartered in Seattle, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Anvil Secure, headquartered in Seattle, tops this list with the largest team on record.
Which city has the most IT security consulting firms?
New York leads with 239 headquartered companies, followed by Houston (148) and Atlanta (139).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 127 verified decision-maker contacts tracked across these 64 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 4, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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